Another thing is psychology.......................when people want to do something clandestine, they usually don't pick on a public place in full view.

We all know the number of private unsecured WiFi hotspots, so one would expect someone to use one of those rather than a public one?

Anyways, if these people have enough knowledge to use a public hotspot for anonymity, wouldn't they also know how to use an anonymous proxy?

And this "marvellous idea" has been dreamed up by people whose mere footsoldiers get paid $100,000 a year!.............plus expenses.............but we won't talk about those right now